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Radical pair interactions in spinach chloroplasts |
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| Authors: | John L. McCracken Harry A. Frank Kenneth Sauer |
| Affiliation: | Department of Chemistry and Laboratory of Chemical Biodynamics, University of California, Berkeley, CA 94720 U.S.A. |
| Abstract: | Time-resolved EPR studies were done on broken spinach chloroplasts under reducing conditions at low temperature (10 K). A dramatic dependence of signal dynamics and lineshape in the g 2.00 region on the reduction state of Photosystem I is demonstrated. Computer simulations of the spin-polarized lineshapes obtained in this work suggest that the primary electron acceptor in Photosystem I, a species known as A1, could be a chlorophyll a dimer. |
| Keywords: | Photosystem I CIDEP ESR Radical pair interaction Chlorophyll a dimer Electron acceptor (Spinach chloroplast) Hepes PS photosystem Chl chlorophyll CIDEP chemically induced dynamic electron polarization Fd ferrodoxin |
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